<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h2>用户登录</h2>
<form action="login" method="post">
    <input type="text" name="username" placeholder="请输入用户名"> <br/>
    <input type="password" name="password" placeholder="请输入密码"> <br/>

    <input type="submit" value="登录">

</form>
</body>
</html>